Doctor Who: The Thirteenth Doctor #4

The Doctor, Graham, Yasmin and Ryan are in search of Dr. Schulz who The Hoarder injected with some unknown substance in order to make her do his bidding. With the revelation that The Hoarder has also made prisoners of children, the gang have their work cut out to save everyone and stop him. But first there is the small matter of the deep dark hole in which they’ve found themselves…